IEC Final Exam Year 1 Questions and Verified Answers, 100% Guarantee Pass (Latest 2025) What is the result if the neutral wire becomes open on a multiwire circuit having unequal loads?a.The load of higher resistance would overheat and probably be damaged.b.The load of lesser resistance would overheat and probably be damaged.c.No effect until one load is turned off or opens.d.No effect. - Correct Answers ✅a.The load of higher resistance would overheat and probably be damaged.Circuits 7 and 9 share a neutral. This is a multiwire branch circuit. If Ckt. 7 is drawing 13 amps and Ckt. 9 is drawing 16 amps, how much current is flowing in the neutral?a.3 b.13 c.29 d.16 - Correct Answers ✅3 Amps 1 / 4
IEC Final Exam Year 1 Questions and Verified Answers, 100% Guarantee Pass (Latest 2025) The Code reference that specifies the type of disconnecting means (circuit breaker for example) that can be used on a multiwire branch circuit that feeds devices mounted on the same yoke [a stack switch or a duplex receptacle for
example] is ___.Note: Select N/A (not applicable) if there is
not an NEC® requirement.a.Article 100 b.240.15(B)(1) c.404.8(A) d.N/A - Correct Answers ✅b. 240.15(B)(1) Voltmeters are connected in ___ with the load when used to measure voltage across a load in a circuit. - Correct Answers ✅Parallel The neutral has been removed from the neutral bar in the circuit shown in Figure 128.407. Lamp 3 is connected in ___ with Lamps 1 and 2. - Correct Answers ✅Series (3 wire parallel circuits turn to series when the neutral is disconnected from the neutral bar) What is the minimum number of receptacles required in an unfinished basement? 2 / 4
IEC Final Exam Year 1 Questions and Verified Answers, 100% Guarantee Pass (Latest 2025) a.2 b.4 c.1 d.0 - Correct Answers ✅c. 1 The overall diameter (including insulation) of a 250 kcmil THHN/THWN copper conductor is ___ inches?a..082 b..397 c..765 d..711 e..575 - Correct Answers ✅d. 711 NEC Chapter 9 Table 5 pg 701 What part of the NEC® is a reference for calculating conduit fill where all conductors are the same size?a.Article 100 b.Table 310.15(B)(16) 3 / 4
IEC Final Exam Year 1 Questions and Verified Answers, 100% Guarantee Pass (Latest 2025) c.Annex C d.Table 314.16(A) - Correct Answers ✅c. Annex C What is the minimum trade size Schedule 80 PVC required to contain four 8 AWG THHN/THWN copper conductors?a.1 b.3/4 c.11/4 d.11/2 e.none of these - Correct Answers ✅b. 3/4 NEC Annex C Eleven #12, five #10, and six #6 THHN/THWN conductors will be installed in a run of EMT. The smallest trade size EMT you can use is ___.a.11/2 b.21/2 c.11/4 d.2 e.1 - Correct Answers ✅c. 11/4
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